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1983年以来,中华稻蝗 Oxya chinensis Thunberg 在我国中部到北部稻区出现迅速回升趋势,甚至暴发成灾。几年来我们对迅速回升的原因进行了一些调查研究,认为它是生态、农药演替及其应用技术、耕作制度、水刊、畜牧、社会变革以及各项人类活动综合作用的结果。现分述如下。1.农药更新换代与应用技术的变化。主要是有机氯被取代。有机氯对蝗虫类有特效,残效期长。有机磷类农药虽然高效低毒低残留、近期效果好,但残效短,多易光解或分解失
Since 1983, Oxya chinensis Thunberg has experienced a rapid rebound in the central and northern rice regions of our country, and even the outbreaks have been catastrophic. In the past few years, we conducted some investigations into the reasons for the rapid rebound. We think of it as the result of a combination of ecology, pesticide succession and its application technologies, farming systems, water issues, livestock husbandry, social change and various human activities. Now is as follows. 1. Pesticide replacement and application of technology changes. Mainly organic chlorine is replaced. Organochlorines have special effects on locusts, long residual period. Organic phosphorus pesticides, although efficient and low toxicity and low residue, the recent effect is good, but the residual short, easy to photolytic or decomposition loss